1. An injection
well must be:
(a) Situated on a well-drained
site not subject to inundation by a flood with a recurrence interval of 100
years.
(b) Sited in such a way that
it injects into a formation which is separated from any underground source of
drinking water by a confining zone that is free of known open faults or
fractures within the area of review.
(c) Easily accessible for maintenance,
repair, testing, or such other attention as may be necessary.
(d) Separated by a minimum horizontal
distance of 50 feet from any water-tight conduit, such as a cast-iron pipe
which carries sewage or other liquid wastes.
(e) Separated by a minimum horizontal
distance of 100 feet from any septic tank, drain field or other facility for
the collection or disposal of other liquid waste.
(f) Separated by a minimum horizontal
distance of 10 feet from the boundary of any adjoining property.
(g) Cased from the finished surface to the
top of the zone for injection and constructed so that no contamination can
occur as a result of conditions on the surface surrounding the well.
(h) Cemented to prevent movement of fluid
into or between underground sources of drinking water. The casing and cement
used in the construction of each injection well must be designed to endure for
the life expectancy of the well.
2. All injections into an injection well must
be through tubing set on a mechanical packer, unless another means is approved
by the Director. The packer must be set between the top of the zone for
injection and the bottom of the next highest underground source of drinking
water and as close as possible to the top of the injected interval.
3. The wellhead must be equipped above the
ground with valves for the observation of pressure for each annular opening of
the well and for the tubing.
Added to NAC by
Environmental Comm'n, eff. 7-22-87-Substituted in revision for NAC
445.42695
